CORRECTION Just received CK gas lens kit. Worked like a charm. GOD stay away from the chinese ebay gas lenses....should have been on this forum earlier....pissed off... But, having a 250amp machine is nice. The CK gas lens is an entirely different animal....very good quality....glass is much thicker...

After waiting months for an AHP I started TIGn Alum with no problems . When I switched out to a gas lens the puddles went dirty...no matter what the settings....checked for gas leaks....the whole 9 yards. Sent the AHP back for a refund. Now have the Everlast 250...nice machine. Again...no problems.....